Extrinsic 17928-1

{
  "heartbeat": {
    "blockNumber": 17927,
    "sessionIndex": 298,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xdc0415d3b635711da326d98281f94b57be276fd604e8659e6a2319c7d3efd7059e3f2c5c1011ee182042dd45cfd4f20da0449eae2533d57b6091bbc879186587"
}